Short answer: the Zealot PT21. It ranks #12 of 43 party speakers by sound quality, rated 4.1/5, at $225.86; the Soundboks Rider ranks #26, rated 3.4/5, and costs $599, so there is not much of a tradeoff to weigh.
What the Zealot PT21 does well: Dual 166mm woofers and 200W output in a lighter, more compact body than the ZE41, with a bundled wireless microphone and echo effect built in for karaoke. Watch for: Unlike some other Zealot models, app-based EQ customization doesn’t appear to be fully supported yet, and IPX5 means it can handle splashes but not submersion.
Why pick the Soundboks Rider: At 6.5 kg it is the lightest Soundboks yet, with a carry handle, IP66 dust and water protection, and the same swappable 100Wh battery as the Mix and Soundboks 4, rated for 35 hours at mid volume and 8 hours at maximum. The tradeoff: Its sealed 8in woofer runs out of real bass at high volume: Xander measured the -6 dB point rising to roughly 75 to 85 Hz at maximum, with 40 Hz some 20 dB down, and M1M heard the bass pulled back toward the upper bass above mid volume.
Buy the Zealot PT21. It is rated higher for sound quality than the Soundboks Rider and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Battery life favors the Zealot PT21: rated for 60 hours against 35 hours for the Soundboks Rider.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Zealot PT21 | Soundboks Rider | |
|---|---|---|
| Price | $216.73 | $599.00 |
| Ranked | #12 of 43 in Party Size Portable Bluetooth Speakers | #26 of 43 in Party Size Portable Bluetooth Speakers |
| App | No | Yes (Soundboks) |
| Aux Input | Yes | Yes |
| Battery Capacity | 48000mAh (12x4000mAh) | - |
| Bluetooth Version | 5.3 | - |
| Dimensions | 21.1” x 8.6” x 11.9” (535 x 219 x 303 mm) | - |
| Drivers | 2x 166mm woofers + tweeters + midrange drivers | 8” woofer (sealed), 1.2” dome tweeter in horn |
| EQ | Yes (Bass, Voice, Standard modes) | Yes (6-band EQ + Bass+, Indoor and Outdoor profiles) |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 40Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX5 | IP66 |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| MicroSD Playback | Yes | - |
| Amplifier Power | 200W | 92W RMS (72W woofer + 20W tweeter) |
| Party Mode | Yes (PartyAdd up to 100 speakers) | No (no TeamUp) |
| Power Bank | Yes (USB-A) | - |
| Power Input | Type-C | USB-C (65W fast charging) |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | Yes | - |
| Weight | 20.7 lbs (9.4 kg) | 14.3 lbs (6.5 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | - |
| Lights | Yes | - |
| Battery Life | 60 hours (Manufacturer specified) | 35 hours (Manufacturer specified) |
| Maximum SPL | - | 113.2dB(C) (measured by M1M Tech Channel) |
| Removable Battery | - | Yes |
| Strap | - | No |
Related Speaker Comparisons
More worthwhile head-to-heads for Zealot PT21:
- Sony ULT Tower 7 vs Zealot PT21
- Zealot PT21 vs JBL Partybox 330
- JBL Partybox Stage 320 vs Zealot PT21
- JBL Partybox 310 vs Zealot PT21
- Sony ULT Tower 5 vs Zealot PT21
Prices on this page were last checked September 26, 2026 at 11:14 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Zealot PT21: $216.73 AliExpress eBay
Pros: Dual 166mm woofers and 200W output in a lighter, more compact body than the ZE41, with a bundled wireless microphone and echo effect built in for karaoke. Quite deep bass for the price, even deeper than the JBL Boombox 4 in direct comparisons.
Cons: Unlike some other Zealot models, app-based EQ customization doesn’t appear to be fully supported yet, and IPX5 means it can handle splashes but not submersion.
Full Zealot PT21 review and specifications →
| Amplifier Power | 200W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Capacity | 48000mAh (12x4000mAh) |
| Battery Life | 60 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 21.1” x 8.6” x 11.9” (535 x 219 x 303 mm) |
| Drivers | 2x 166mm woofers + tweeters + midrange drivers |
| EQ | Yes (Bass, Voice, Standard modes) |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX5 |
| Lights | Yes |
| MicroSD Playback | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | Type-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 20.7 lbs (9.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Zealot PT21 Vs Jbl Boombox 4!!! 😁😁😁 More from Jagistreviews →
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- Head-to-Head Comparisons
Soundboks Rider: $599.00 Amazon eBay
Pros: At 6.5 kg it is the lightest Soundboks yet, with a carry handle, IP66 dust and water protection, and the same swappable 100Wh battery as the Mix and Soundboks 4, rated for 35 hours at mid volume and 8 hours at maximum. Xander’s measurements found its flat profile genuinely flat, with distortion around 0.2 percent at moderate volume and below 2 percent from 500 Hz to 10 kHz even at full output, and the Indoor profile reaching down to 40 Hz at moderate volume. Both Xander and M1M Tech Channel preferred its punchy, controlled kick bass to the larger Soundboks Mix, and the app adds a six-band EQ with saveable presets.
Cons: Its sealed 8in woofer runs out of real bass at high volume: Xander measured the -6 dB point rising to roughly 75 to 85 Hz at maximum, with 40 Hz some 20 dB down, and M1M heard the bass pulled back toward the upper bass above mid volume. It measured 107 dB(C) outdoors for Xander and 113.2 dB(C) for M1M, about 3 dB below the Soundboks Mix and well short of the claimed 118 dB. There is no TeamUp, so it cannot link with other Soundboks speakers, the strap and charger are sold separately, and Xander found the grille causes dispersion artifacts around 5 kHz and judged the price too high for what it delivers.
Full Soundboks Rider review and specifications →
| Amplifier Power | 92W RMS (72W woofer + 20W tweeter) |
|---|---|
| App | Yes (Soundboks) |
| Aux Input | Yes |
| Battery Life | 35 hours (Manufacturer specified) |
| Digital Aux Input | No |
| Drivers | 8” woofer (sealed), 1.2” dome tweeter in horn |
| EQ | Yes (6-band EQ + Bass+, Indoor and Outdoor profiles) |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP66 |
| Maximum SPL | 113.2dB(C) (measured by M1M Tech Channel) |
| Omnidirectional | No |
| Party Mode | No (no TeamUp) |
| Power Input | USB-C (65W fast charging) |
| Removable Battery | Yes |
| Stereo | No |
| Strap | No |
| TWS | No |
| Weight | 14.3 lbs (6.5 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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- Soundboks Rider vs Soundboks Mix
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- Soundboks Rider vs Sony SRS-XV500
- Soundboks Rider vs JBL Partybox 110
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- See all 27 comparisons